One-handle Type Faucet having a double anti-reverse  function to prevent waste materials from flowing backward into the faucet when disaster happens

ABSTRACT

A faucet includes a faucet body provided with a receiving chamber, a first outlet port and a second outlet port, a first check valve mounted in the receiving chamber of the faucet body and located between the first outlet port and the second outlet port of the faucet body, a water output unit mounted on the faucet body and having an inner portion provided with a receiving space connected to the second outlet port of the faucet body, and a second check valve mounted in the receiving space of the water output unit. Thus, the first check valve co-operates with the second check valve to form a double anti-reverse function to prevent the waste water from flowing backward into the water entrance of the faucet body so as to protect the water source of the faucet.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a faucet and, more particularly, to aone-handle type faucet.

2. Description of the Related Art

A conventional faucet comprises a faucet body having an inner portionprovided with a receiving chamber and having a periphery provided with afirst outlet port and a second outlet port each connected to thereceiving chamber, a control valve mounted in the receiving chamber ofthe faucet body, a water output unit mounted on the faucet body andconnected to the second outlet port of the faucet body. The faucet bodyis provided with a water entrance connected to the receiving chamber.The receiving chamber of the faucet body is connected between the waterentrance, the first outlet port and the second outlet port of the faucetbody. The water entrance, the first outlet port and the second outletport of the faucet body are isolated from each other and are connectedby the receiving chamber of the faucet body. The first outlet port ofthe faucet body is connected to a spout (not shown). The second outletport of the faucet body is connected to a spraying unit through thewater output unit. The spraying unit includes a nozzle head, a pressbutton, a hose and a connector. The connector of the spraying unit isconnected with the water output unit. In operation, when the sprayingunit is closed, the water can be delivered to the spout by control ofthe control valve and is sprayed outward from the spout for use with auser. On the contrary, when the spraying unit is opened by pressing thepress button, the water can be delivered to the spraying unit. Thus, thewater can be injected outward from the nozzle head of the spraying unitfor use with the user. However, when the spraying unit is placed in adrainage or sink, the waste water from the drainage or sink easily flowsthrough the spraying unit, the water output unit and the second outletport of the faucet body into the receiving chamber of the faucet bodyand is delivered into the water entrance of the faucet body to pollutethe water source of the faucet body, thereby causing danger to the user.

BRIEF SUMMARY OF THE INVENTION

In accordance with the present invention, there is provided a faucet,comprising a faucet body having an inner portion provided with areceiving chamber and having a periphery provided with a first outletport and a second outlet port each connected to the receiving chamber, afirst check valve mounted in the receiving chamber of the faucet bodyand located between the first outlet port and the second outlet port ofthe faucet body, a water output unit mounted on the faucet body andhaving an inner portion provided with a receiving space connected to thesecond outlet port of the faucet body, and a second check valve mountedin the receiving space of the water output unit.

The primary objective of the present invention is to provide aone-handle type faucet having a double anti-reverse function to preventwaste materials from flowing backward into the faucet when disasterhappens.

According to the primary advantage of the present invention, the plug ofthe second check valve is tightly inserted into the socket of the wateroutput unit to isolate the water output unit from the second checkvalve, while the sealing gasket of the first check valve presses theperipheral wall of the receiving chamber to isolate the second outletport of the faucet body from the water entrance of the faucet body sothat the first check valve co-operates with the second check valve toform a double anti-reverse function to prevent the waste water fromflowing backward into the water entrance of the faucet body so as toprotect the water source of the faucet.

Further benefits and advantages of the present invention will becomeapparent after a careful reading of the detailed description withappropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

FIG. 1 is an exploded perspective assembly view of a faucet inaccordance with the preferred embodiment of the present invention.

FIG. 2 is an exploded perspective view of a first check valve of thefaucet as shown in FIG. 1.

FIG. 3 is an exploded perspective view of a second check valve of thefaucet as shown in FIG. 1.

FIG. 4 is a front cross-sectional assembly operational view of thefaucet as shown in FIG. 1.

FIG. 5 is a front cross-sectional assembly operational view of thefaucet as shown in FIG. 1.

FIG. 6 is a front cross-sectional assembly operational view of thefaucet as shown in FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially to FIGS. 1-4, a faucet inaccordance with the preferred embodiment of the present inventioncomprises a faucet body 4 having an inner portion provided with areceiving chamber 41 and having a periphery provided with a first outletport 44 and a second outlet port 43 each connected to the receivingchamber 41, a first check valve 2 mounted in the receiving chamber 41 ofthe faucet body 4 and located between the first outlet port 44 and thesecond outlet port 43 of the faucet body 4, a water output unit 3mounted on the faucet body 4 and having an inner portion provided with areceiving space 32 connected to the second outlet port 43 of the faucetbody 4, and a second check valve 1 mounted in the receiving space 32 ofthe water output unit 3.

The faucet body 4 is provided with a water entrance 42 connected to thereceiving chamber 41. The receiving chamber 41 of the faucet body 4 isconnected between the water entrance 42, the first outlet port 44 andthe second outlet port 43 of the faucet body 4. The water entrance 42,the first outlet port 44 and the second outlet port 43 of the faucetbody 4 are isolated from each other and are connected by the receivingchamber 41 of the faucet body 4. The first outlet port 44 of the faucetbody 4 is connected to a spout (not shown). The second outlet port 43 ofthe faucet body 4 is connected to a spraying unit 5 through the wateroutput unit 3 and the second check valve 1. The spraying unit 5 includesa nozzle head 51, a press button 52, a hose 53 and a connector 54. Theconnector 54 of the spraying unit 5 is connected with the second checkvalve 1.

The first check valve 2 includes a valve housing 24 mounted in thereceiving chamber 41 of the faucet body 4 and having an inner portionprovided with a flow channel 240 which is connected to The first outletport 44 of the faucet body 4 and has a peripheral wall provided with aflange 243, a valve shaft 21 movably mounted in the flow channel 240 ofthe valve housing 24, a sealing gasket 25 mounted on the valve shaft 21to move in concert with the valve shaft 21 and abutting a peripheralwall of the receiving chamber 41, and a stopper 22 mounted on the valveshaft 21 to move in concert with the valve shaft 21 and detachablyabutting the flange 243 of the valve housing 24 to isolate the flowchannel 240 of the valve housing 24 from The first outlet port 44 of thefaucet body 4.

The valve housing 24 of the first check valve 2 has a surface providedwith a plurality of transverse connecting openings 242 each connectedbetween the flow channel 240 of the valve housing 24 and the waterentrance 42 of the faucet body 4. The valve housing 24 of the firstcheck valve 2 has a peripheral wall provided with a retaining groove 241to receive an O-ring 23 which presses the peripheral wall of thereceiving chamber 41. The flow channel 240 of the valve housing 24 isconnected between the receiving chamber 41 and The first outlet port 44of the faucet body 4, and the receiving chamber 41 of the faucet body 4is connected between the flow channel 240 of the valve housing 24 andthe second outlet port 43 of the faucet body 4.

The valve shaft 21 of the first check valve 2 has a first end 211provided with a first mounting portion 212 for mounting the stopper 22and has a second end 214 provided with a second mounting portion 213 formounting the sealing gasket 25.

The stopper 22 of the first check valve 2 has a tapered shape and islocated between the flange 243 of the valve housing 24 and The firstoutlet port 44 of the faucet body 4.

The sealing gasket 25 of the first check valve 2 is located between thereceiving chamber 41 of the faucet body 4 and the flow channel 240 ofthe valve housing 24 to isolate the second outlet port 43 of the faucetbody 4 from the water entrance 42 of the faucet body 4. The sealinggasket 25 of the first check valve 2 has a tapered thin wall 250pressing the peripheral wall of the receiving chamber 41 to isolate thereceiving chamber 41 and the second outlet port 43 of the faucet body 4from the flow channel 240 of the valve housing 24 and the water entrance42 of the faucet body 4. The tapered thin wall 250 of the sealing gasket25 has a substantially V-shaped cross-sectional profile. The taperedthin wall 250 of the sealing gasket 25 is flexible and contractibleradially and inwardly to detach from the peripheral wall of thereceiving chamber 41 to connect the receiving chamber 41 of the faucetbody 4 to the flow channel 240 of the valve housing 24.

The water output unit 3 is located between the second outlet port 43 ofthe faucet body 4 and the second check valve 1. The receiving space 32of the water output unit 3 is connected between the second outlet port43 of the faucet body 4 and the second check valve 1 and has aperipheral wall provided with a socket 33.

The second check valve 1 is located between the water output unit 3 andthe spraying unit 5 and includes a slide 12 movably mounted in thereceiving space 32 of the water output unit 3, a plug 11 mounted on theslide 12 to move in concert with the slide 12 and detachably insertedinto the socket 33 of the water output unit 3 to interrupt a connectionbetween the receiving space 32 of the water output unit 3 and the secondcheck valve 1, a mounting tube 15 mounted on the water output unit 3 andspaced from the slide 12, and an elastic member 13 biased between themounting tube 15 and the slide 12 to push the plug 11 toward the socket33 of the water output unit 3.

The mounting tube 15 of the second check valve 1 has an inner portionprovided with a flow conduit 150 connected to the receiving space 32 ofthe water output unit 3, and the receiving space 32 of the water outputunit 3 is connected between the second outlet port 43 of the faucet body4 and the flow conduit 150 of the mounting tube 15. The mounting tube 15of the second check valve 1 has a first end provided with a first outerthread 151 engaging the lower end of the water output unit 3 and asecond end provided with a second outer thread 152 engaging theconnector 54 of the spraying unit 5. The mounting tube 15 of the secondcheck valve 1 has a mediate portion provided with a stop shoulder 153located between the first outer thread 151 and the second outer thread152 for mounting an O-ring 14 which presses a peripheral wall of thereceiving space 32.

The slide 12 of the second check valve 1 is located between the socket33 of the water output unit 3 and the mounting tube 15. The slide 12 ofthe second check valve 1 has a first end provided with a recessedmounting section for mounting the plug 11 and a second end which has aninner portion provided with a plurality of longitudinal connectingchannels 122 and has a surface provided with a plurality of transverseconnecting slots 123 connected to the longitudinal connecting channels122. The longitudinal connecting channels 122 and the transverseconnecting slots 123 of the slide 12 are connected between the receivingspace 32 of the water output unit 3 and the flow conduit 150 of themounting tube 15.

In operation, referring to FIGS. 4-6 with reference to FIGS. 1-3, whenthe spraying unit 5 is closed, the water can be delivered to the spout.In such a manner, when water from the water entrance 42 of the faucetbody 4 is delivered through the receiving chamber 41 of the faucet body4 and the transverse connecting openings 242 of the valve housing 24into the flow channel 240 of the valve housing 24, the first end 211 ofthe valve shaft 21 is pushed by the water pressure to form a clearance60 between the stopper 22 and the flange 243 of the valve housing 24 sothat the water from the water entrance 42 of the faucet body 4 in turnflows through the receiving chamber 41 of the faucet body 4, thetransverse connecting openings 242 of the valve housing 24, the flowchannel 240 of the valve housing 24 and the clearance 60 into The firstoutlet port 44 of the faucet body 4 as shown in FIG. 4 and is sprayedoutward from the spout for use with a user. At this time, the sealinggasket 25 of the first check valve 2 has a tapered thin wall 250pressing the peripheral wall of the receiving chamber 41 to isolate thereceiving chamber 41 and the second outlet port 43 of the faucet body 4from the flow channel 240 of the valve housing 24 and the water entrance42 of the faucet body 4 so as to prevent the water in the flow channel240 of the valve housing 24 from entering the second outlet port 43 ofthe faucet body 4.

On the contrary, when the spraying unit 5 is opened by pressing thepress button 52, the water can be delivered to the spraying unit 5. Atthis time, the stopper 22 presses and seals the flange 243 of the valvehousing 24 closely to prevent the water in the flow channel 240 of thevalve housing 24 from flowing into The first outlet port 44 of thefaucet body 4. In such a manner, when the water from the water entrance42 of the faucet body 4 is delivered through the receiving chamber 41 ofthe faucet body 4 and the transverse connecting openings 242 of thevalve housing 24 into the flow channel 240 of the valve housing 24, thetapered thin wall 250 of the sealing gasket 25 is pressed and contractedradially and inwardly by the water pressure to detach from theperipheral wall of the receiving chamber 41 so as to form a first gap 61between the tapered thin wall 250 of the sealing gasket 25 and theperipheral wall of the receiving chamber 41, while the plug 11 of thesecond check valve 1 is pushed by the water pressure to compress theelastic member 13 and to detach from the socket 33 of the water outputunit 3 so as to form a second gap 62 between the plug 11 of the secondcheck valve 1 and the socket 33 of the water output unit 3 so that thewater from the water entrance 42 of the faucet body 4 in turn flowsthrough the transverse connecting openings 242 of the valve housing 24,the flow channel 240 of the valve housing 24, the first gap 61, thereceiving chamber 41 of the faucet body 4, the second outlet port 43 ofthe faucet body 4, the receiving space 32 of the water output unit 3,the second gap 62, the longitudinal connecting channels 122 and thetransverse connecting slots 123 of the slide 12 into the flow conduit150 of the mounting tube 15 as shown in FIG. 5 and is then deliveredthrough the hose 53 into the nozzle head 51 of the spraying unit 5.Thus, the water can be injected outward from the nozzle head 51 of thespraying unit 5 for use with the user.

After the spraying unit 5 is closed by releasing the press button 52,the first check valve 2 and the second check valve 1 are returned to abalance state as shown in FIG. 6. At this time, the plug 11 of thesecond check valve 1 is pushed toward the socket 33 of the water outputunit 3 by the restoring force of the elastic member 13 so that the plug11 of the second check valve 1 is tightly inserted into the socket 33 ofthe water output unit 3 to isolate the receiving space 32 of the wateroutput unit 3 from the second check valve 1 so as to prevent the waterin the flow conduit 150 of the mounting tube 15 from flowing into thereceiving space 32 of the water output unit 3 and the second outlet port43 of the faucet body 4. At the same time, the tapered thin wall 250 ofthe sealing gasket 25 is expanded radially and outwardly by the elasticforce of the sealing gasket 25 so that the tapered thin wall 250 of thesealing gasket 25 presses the peripheral wall of the receiving chamber41 to isolate the receiving chamber 41 and the second outlet port 43 ofthe faucet body 4 from the flow channel 240 of the valve housing 24 andthe water entrance 42 of the faucet body 4 so as to prevent the water inthe receiving chamber 41 and the second outlet port 43 of the faucetbody 4 from entering the flow channel 240 of the valve housing 24 andthe water entrance 42 of the faucet body 4.

In such a manner, even when the spraying unit 5 is placed in a drainageor sink and waste water flows through the spraying unit 5 into the flowconduit 150 of the mounting tube 15, the plug 11 of the second checkvalve 1 is tightly inserted into the socket 33 of the water output unit3 to isolate the receiving space 32 of the water output unit 3 from thesecond check valve 1 so as to prevent the waste water from passingthrough the second check valve 1 into the receiving space 32 of thewater output unit 3 and the second outlet port 43 of the faucet body 4,while the tapered thin wall 250 of the sealing gasket 25 presses theperipheral wall of the receiving chamber 41 to isolate the receivingchamber 41 and the second outlet port 43 of the faucet body 4 from theflow channel 240 of the valve housing 24 and the water entrance 42 ofthe faucet body 4 so as to prevent the waste water from passing throughthe first check valve 2 into the water entrance 42 of the faucet body 4.

Accordingly, the plug 11 of the second check valve 1 is tightly insertedinto the socket 33 of the water output unit 3 to isolate the wateroutput unit 3 from the second check valve 1, while the sealing gasket 25of the first check valve 2 presses the peripheral wall of the receivingchamber 41 to isolate the second outlet port 43 of the faucet body 4from the water entrance 42 of the faucet body 4 so that the first checkvalve 2 co-operates with the second check valve 1 to form a doubleanti-reverse function to prevent the waste water from flowing backwardinto the water entrance 42 of the faucet body 4 so as to protect thewater source of the faucet.

Although the invention has been explained in relation to its preferredembodiment(s) as mentioned above, it is to be understood that many otherpossible modifications and variations can be made without departing fromthe scope of the present invention. It is, therefore, contemplated thatthe appended claim or claims will cover such modifications andvariations that fall within the true scope of the invention.

1. A faucet, comprising: a faucet body having an inner portion providedwith a receiving chamber and having a periphery provided with a firstoutlet port and a second outlet port each connected to the receivingchamber; a first check valve mounted in the receiving chamber of thefaucet body and located between the first outlet port and the secondoutlet port of the faucet body; a water output unit mounted on thefaucet body and having an inner portion provided with a receiving spaceconnected to the second outlet port of the faucet body; and a secondcheck valve mounted in the receiving space of the water output unit. 2.The faucet of claim 1, wherein the first check valve includes: a valvehousing mounted in the receiving chamber of the faucet body and havingan inner portion provided with a flow channel which is connected to theoutlet port of the faucet body and has a peripheral wall provided with aflange; a valve shaft movably mounted in the flow channel of the valvehousing; a sealing gasket mounted on the valve shaft to move in concertwith the valve shaft and abutting a peripheral wall of the receivingchamber; and a stopper mounted on the valve shaft to move in concertwith the valve shaft and detachably abutting the flange of the valvehousing to isolate the flow channel of the valve housing from the outletport of the faucet body.
 3. The faucet of claim 2, wherein the faucetbody is provided with a water entrance connected to the receivingchamber; the valve housing of the first check valve has a surfaceprovided with a plurality of transverse connecting openings eachconnected between the flow channel of the valve housing and the waterentrance of the faucet body.
 4. The faucet of claim 2, wherein the valvehousing of the first check valve has a peripheral wall provided with aretaining groove to receive an O-ring which presses the peripheral wallof the receiving chamber.
 5. The faucet of claim 2, wherein the valveshaft of the first check valve has a first end provided with a firstmounting portion for mounting the stopper and has a second end providedwith a second mounting portion for mounting the sealing gasket.
 6. Thefaucet of claim 1, wherein the receiving space of the water output unithas a peripheral wall provided with a socket; the second check valveincludes: a slide movably mounted in the receiving space of the wateroutput unit; a plug mounted on the slide to move in concert with theslide and detachably inserted into the socket of the water output unitto interrupt a connection between the receiving space of the wateroutput unit and the second check valve; a mounting tube mounted on thewater output unit and spaced from the slide; and an elastic memberbiased between the mounting tube and the slide to push the plug towardthe socket of the water output unit.
 7. The faucet of claim 6, whereinthe mounting tube of the second check valve has an inner portionprovided with a flow conduit connected to the receiving space of thewater output unit; the receiving space of the water output unit isconnected between the second outlet port of the faucet body and the flowconduit of the mounting tube.
 8. The faucet of claim 6, wherein themounting tube of the second check valve has a first end provided with afirst outer thread engaging the lower end of the water output unit and asecond end provided with a second outer thread engaging the connector ofthe spraying unit.
 9. The faucet of claim 8, wherein the mounting tubeof the second check valve has a mediate portion provided with a stopshoulder located between the first outer thread and the second outerthread for mounting an O-ring which presses a peripheral wall of thereceiving space.
 10. The faucet of claim 7, wherein the slide of thesecond cheek valve has a first end provided with a recessed mountingsection for mounting the plug; the slide of the second check valve has asecond end which has an inner portion provided with a plurality oflongitudinal connecting channels and has a surface provided with aplurality of transverse connecting slots connected to the longitudinalconnecting channels.
 11. The faucet of claim 10, wherein thelongitudinal connecting channels and the transverse connecting slots ofthe slide are connected between the receiving space of the water outputunit and the flow conduit of the mounting tube.
 12. The faucet of claim3, wherein the receiving chamber of the faucet body is connected betweenthe water entrance, the first outlet port and the second outlet port ofthe faucet body; the water entrance, the first outlet port and thesecond outlet port of the faucet body are isolated from each other andare connected by the receiving chamber of the faucet body.
 13. Thefaucet of claim 2, wherein the flow channel of the valve housing isconnected between the receiving chamber and the outlet port of thefaucet body; the receiving chamber of the faucet body is connectedbetween the flow channel of the valve housing and the second outlet portof the faucet body.
 14. The faucet of claim 2, wherein the stopper ofthe first check valve has a tapered shape and is located between theflange of the valve housing and the outlet port of the faucet body. 15.The faucet of claim 3, wherein the sealing gasket of the first checkvalve is located between the receiving chamber of the faucet body andthe flow channel of the valve housing to isolate the second outlet portof the faucet body from the water entrance of the faucet body.
 16. Thefaucet of claim 3, wherein the sealing gasket of the first check valvehas a tapered thin wall pressing the peripheral wall of the receivingchamber to isolate the receiving chamber and the second outlet port ofthe faucet body from the flow channel of the valve housing and the waterentrance of the faucet body; the tapered thin wall of the sealing gaskethas a substantially V-shaped cross-sectional profile; the tapered thinwall of the sealing gasket is flexible and contractible radially andinwardly to detach from the peripheral wall of the receiving chamber toconnect the receiving chamber of the faucet body to the flow channel ofthe valve housing.
 17. The faucet of claim 1, wherein the water outputunit is located between the second outlet port of the faucet body andthe second check valve; the receiving space of the water output unit isconnected between the second outlet port of the faucet body and thesecond check valve.
 18. The faucet of claim 6, wherein the slide of thesecond check valve is located between the socket of the water outputunit and the mounting tube.